About this 3D model

This puzzle was described on my Instructables page, >http://www.instructables.com/id/A-Diabolical-Puzzle/< but since I've been having such a great time giving these away to strangers, I'm adding it here. The idea is to make the 2 pieces into a pyramid. It can be done, but it's not as easy as you might think. A great ice breaker. Update: AdanA took cymon's comment about cutting the pieces in half and ran with it: http://www.thingiverse.com/thing:29082 Exponentially more difficult and more likely to win lunch bets. This reminds me of that movie where a hitchhiker had the idea about doing the guy who invented the "6 Minute Abs" one better by coming up with "5 Minute Abs". Well here's my entry into the multi-pyramid puzzle war... No, it's not 6 pieces, just 4 cut a different way.